A conservative group is pledging to work against Republican senators who support the stimulus.

(CNN) – An influential conservative political action committee is pledging to support primary challengers to any Republican senator who supports President Obama's stimulus package - the latest public show of dissatisfaction from the right over the massive measure before Congress.

"The American people don’t want this trillion dollar political payoff that will just line the pockets of non-governmental organizations who supported [President] Obama in the election,” said Scott Wheeler, the executive director of The National Republican Trust PAC, an organization that calls for less government spending and lower taxes.

“Republican senators are on notice," Wheeler said. "If they support the stimulus package, we will make sure every voter in their state knows how they tried to further bankrupt voters in an already bad economy.”